2566730756 has 6 divisors (see below), whose sum is σ = 4491778830. Its totient is φ = 1283365376.

The previous prime is 2566730723. The next prime is 2566730779. The reversal of 2566730756 is 6570376652.

It can be written as a sum of positive squares in only one way, i.e., 1514766400 + 1051964356 = 38920^2 + 32434^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2566730756.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320841341 + ... + 320841348.

It is an arithmetic number, because the mean of its divisors is an integer number (748629805).

Almost surely, 2^2566730756 is an apocalyptic number.

It is an amenable number.

2566730756 is a deficient number, since it is larger than the sum of its proper divisors (1925048074).

2566730756 is a wasteful number, since it uses less digits than its factorization.

2566730756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641682693 (or 641682691 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 47.

The square root of 2566730756 is about 50662.9130232362. The cubic root of 2566730756 is about 1369.1786072059.

The spelling of 2566730756 in words is "two billion, five hundred sixty-six million, seven hundred thirty thousand, seven hundred fifty-six".